Escapement mechanism



C. SPIRO.

ESCAPE-MENT MECHANISM.

APPLICATION FILED FEB. 14, 1920.

Patented Aug. 23, 1921.

INVENTOR. Gil/7515s. SP/fi'O BY r-\ ATTORNE WITNESS:

C. SPIRO. ESCAPEMENT MECHANISM. APPLICATIVON FILED FEB. 14, 1920.

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v C. SPIRO.

ESCAPEMENT MECHANISM.

APPLICATION FILED FEB. 14, 1920.

1,388,615. Patentad Aug. 23,1921.

3 SHEETS-SHEET 3..

that the escapement may be actuated inde- 'UMTED;

PATENT QFFICE,

seems were was a ASSIGLTQB. e FEDERAL Anmm MACHINE GQFQMTIQE er N W was N- QQa Q er N 1 NEW JERSEY sesame To all whom may 50mm Be it knownthat 1, CHARLES Srnio, citizen of the'United States, residing at New York, in thecounty of New York and State of New York have invented certain new and useful Improvements in Esc'apement Mecha 'rangement of parts whereby a rocklng esnism, of which the'following is fa specification. 7

f This invention relates to an escapement mechanism for typewriting machines. and.

particularly to a construction adapted to be actuatedby the universal'bail or. indepen dently thereof by the space-bar'action. i

v The invention has for an object to provide a novel andimproved construction and arca-pement'yoke carries the fixed and movable dogs cooperating with a ratchet escapement 1 wheel and-is mounted to be actuated inone direction. by a typebar actuated universal bail, and also to be actuated independently of said bail by a space-bar connection'there with.' V

Another object of the invention is to present a novel construction of escapement yokehaving a l os'tgmotionconnectlon with a recoprocatedtype bar actuateduniversal. bail tojbe operated thereby, and also provided .with an operating member disposed to be engaged by a space-bar connection so pendent of the universal bail and the oper- *ated parts controlled'ther'eby ap ed lt ii k A further object of the invention is to provide an improved construction of escapement yoke pivotallymounted upon the spring housing and carrying fixed and movable dogscooperatingwith an escapement ratchet wheehtogether withmans by which the movable dog; may be Withdrawn from said wheel in order 'torelease "the escapementand a ply*araai ingbra e when .de-

sired, such parts being operated a coope mg t bula ise are mens Other and further objects and advantages of th'e'inventionwill beihereinafterset'ftorth' and the novel features escapement wheel is held.

ESCAPEMENT MECHANISM.

Specificati n f L t e aten Patented Aug. 23, 1921 a lication filed l ebruary m, 1920. Serial No. 358,591. 1

Fig. 4 isa detail side elevation, with parts in section, of the esc'apement mechanism and the cooperating release and braking devices.

Fig. 5 is a detail-perspective of the escapeand also the universal bail or bar 13, adapted to be actuated by shoulders upon said type bars 1n the usual manner to provide a rearward reciprocation-of this bail. The bail 13 maybe supported in any desired manner, for lnstance' by means of, the hangers 14 pivotally connected'thereto at 15, and also to a bracket 16 from the rear of the segment,

asshown at 17. For the purpose of restoring the ball a tension spring '18 is provided at the pivot 17 and has its free end engag ing the hanger 14. Extending rearwardly from the bail are arms 19 provided attheir free ends with bifurcated or open sockets 20 adapte'd'to impart motion in one direction to the escapement mechanism.

This esca'pement mechanism comprises the usual spring devices disposed within a housing 21, which is secured in any preferred manner to the top plate 22of the frame, and

the shaftdriven by said spring is provided with the gear 23 adapted to mesh with the driving rack 24 upon the carriage 25, as usual in this art. The driving shaft 26 of the escapement is providedwith a brake disk 27,

secured thereto, and an escapement wheel 28.

This wheel isof the usual toothed character,

andloosely mounted uponthe shaft 26 and connected thereto by means ofa pawl 29 pivoted upon the wheelat 30 and held in contact with a ratchet wheel '31 secured to the shaft-by means of a spring 32, as shown The dogmechanism cooperating with the ratchetwheel is carried by a yoke member I 35, which is pivotally mounted to rock upon the housing 21 in an'y desired manner, for instance by means ofthe' depending lugs 36, I froin the" housing carrying the pivot screws 37, which enter pivoting ears 38, formed from the yoke 35, as shown in Figs. 3 and 5. The yoke 35 is rocked upon these pivots through the universal bail by means of uprights 39 carrying lateral pins 40 which seat in the open ends 20 of the rearward arms from the bail.

The yoke 35 supports the dogs cooperating with the ratchet wheel, and for this purpose is provided with a lateral frame ll having a lug 42 at its free end, to which the fined dog 43 is secured. This frame is also provided with a stop member 44: bent therefrom to limit the movement of the movable dog 45, which is pivoted upon the yoke by a stud screw/lG, and normally drawn toward said stop M by a tension spring d? extending from the dog to a lug t8 upon the yoke. The movable dog 45 is mounted for both an oscillatory movement toward and from the fixed dog and'also a longitudinal movement upon its pivot radially toward and from the teeth a of the escapement wheel. This may be accomplished in any desired manner, for instance by meansof the slot 49 in the 1110?. able dog 45. The yoke, when rocked in one direction by the universal bar is restored to normal position by means of a tension spring 50 secured at one end to the houslng 21, and

at its opposite end to a lug :"ilfrom the yoke.

The yoke is also adapted to be operated independently ofthe universal bail through the space bar mechanism in order that the .escapement may be actuated without operation of the bail and the parts controlled thereby, which results in-a material saving in the wearupon the several parts and in the touch action from the space bar. For this purpose the yoke is provided with a depending finger 52 having its free end deflected at an angle thereto 'and adapted to be engagedupon its rear face by a rocker arm 54;, extending from a rock-shaft which is pivoted at its opposite ends 56 in the frame 10 of the machine. This rock shaft carries the usual forwardly extending arms 57, which are connected at the key board of the machine by the space bar 58, as shown in Fig. 1. For the purpose of restoring the space barto its elevated position after depression to actuate the escapement, an arm 59 is provided thereon from which a tension spring'60 extends and is secured at 61 to' the machine frame. It will be seen that a depression of the space bar rocks the escapement yoke, so that the actuating pins 40 thereon move away from their seats in the universal bail, whicheffects an operation of the escapement dogs entirely independent of the action from said bail. Z

When it is desired to release the escapement for tabulating or other purposes, the movabledogmay be shifted upon its pivot radially-of the escapement wheel by any desired means, a preferable form of which comprises the lever 62, pivoted at 63 upon the yoke and having its inner end 6 1- seated in a recess 65 formed on the movable dog 4&5, so as to provide an actuating connection therewith. This recess may be formed by a projection 66 from the dog against which the end 6 of the lever bears. The opposite end 67 of the releasing lever is adapted to seat in the open or bifurcated end 68 of a push link 69. This link may be actuated by any desired connections, for instance such as shown in my Patent-No. 987,766, of March 28, 1911, wherein a release bail 70 mounted upon a pivot 71 .iSfconnect-ed at 72 with a push link 69 to effect a reciprocating motion thereoffi Upon the same pivot Tl a brake bail '73 is mounted and; carries an upright 7 f upon which a brake shoe 75 is mounted to engage'the disk 27 when the escapement is released. The brakeand release bails'are suitably supported upon a fined part and adapted to be actuated by contact with a reciprocating member engaging ben-ath the same, such as the tabulator abutment finger 7 6, which is slidingly mounted at 77' for movement in a vertical path and provided with a shoulder 78 be neath the bails so that they are lifted thereby in the upward movement of the finger 76 and the r lease link and brake shoe forced inward toward the cooperating members of the escapemont. The tabulator finger 76 maybe actuated in any preferred manner, for instance the lower end79 thereof is pivotally connected at 80, with a rock lever31 pivotally supported by the frame at 32 and restored by a spring The keyboard end of the rock lever 81 has pivotally mounted thereon at 3-1 the: push key 85 of the usual type.

Theopposite ends of the yoke are extendedlongitudinally as 86. and each. provided with an attached pivoting lug 87, which carries the ribbon actuating pawl 88.

'lhesepawls are pivoted to said lugs by chine.

The ribbon is connected in the usual manner to the vibrator 96, adapted tov be actuated from the universal bail, for i nstance by the connection 97 to the vibrator lever 98, whichhas one arm 99 slidably connected to a case-shifting head 100 carried by the depending arm 101 from the universal bail.

The vibrator lever 98 may be; mounted in by the spacebar connection independentof the universal bail, the ribbon vibrator is left at rest, and the frictional resistance and wear ratchet wheel of'the escapementj This movedueto the shifting orthese parts entirely avoided, thus roducing a qiiick and definite operation oft e escapenientf In the opera tion' of the invention, it will be'seen that the rearward reciprocation of the universal bail underthe action of the typeba-r efl'ectsa rocking of the escapement yoke and the feed ofthe dogs relative to the mfil t causes the fi g r d p n i o the yoke to move a a m theficfiuating arm of the space bar so that the escapement is operated iinde pende'nt thereofQ The loose J connection betweenthe bailand escapement yoke efi'ects movement of the latter only in y the universal ball, as whenoperated'through I pended Claimsf' the rearward movement of the bail, and per mits the yoke to be rocked rearwardly to actuate the letter space" feed independent of space-bar mechanisms. The mounting of the escapement yoke to rock with the dogs carried therebyprovidesa construction for the step feed of the carriage and also for the feed of the ribbon through pawls carried by'the ends of-rt'he yoke, while the construction "of the movable dog permits the complete releaseof theescape nent through cooperating mechanism, such as tabulating elements.

7 Themounting of this yoke upon the casing for the springdrum permits the entire es-,

capement inec'ha'nism tobe carried as a unit upon the under face of the rear top plate of thema'chine so that 'it may be assembled thereon and directly inserted into' co6pera tive relation with the universal bail and 7 spa e bar lever, and also the brake and release bails, which are disposed upon a fixed part at the rear of thecihachine. V

It be seen that this invention presents an efficient and economically manufactured construction of escapement mechanism adapted to cooperate with the various actuating elements of a typewriting machine, and whilethe details of construction have been sn vi ca y eem d a d Show Still the i vention is net confined thereto, as it isobvious that changes and alterations may be made there w n the 's pe of th n 'What ai i c a a rewri es a na m t member th rv e pio d' w h anescapement wheel, a movable member pivoted upon an axis intersecting that of the wheel and carrying fixed and movable dogs cooperating with said wheel, a space bar action arranged to engage and actuate said movable member, and a universal bail having means to actuate said movable member independent of the space bar action. 7

2. In a typewriter, a carriage, a motor member therefor provided with an escapement wheel, a depending rocking member. pivoted upon the casing for said motor member and carrying fixed and movable dogs cooperating with said wheel, a space bar action arranged to engage and actuate said movable member, and a reciprocating type bar actuated universal bail connected to said movable member to. actuate the same in one direction.

3. In a typewriter, a carriage, a motor member therefor provided with an escapement wheel, a movable member disposed parallel to and beneath said wheel and carrying fixed and movable dogs coeperating with said wheel, a space bar action arranged to engage and actuate said movable member, and a reciprocating universal bail having an arm loosely connected to actuate said movable member in its rearward travel.

4a In a typewriter, a carriage, a motor member therefor provided with an escapement wheel, a movable member disposed parallel to the wheel and carrying fixed and movable dogs coeperating with said wheel, a space bar action arranged to engage and actuate saidmovable member, and a reciproeating universal bail having rearwardly ex tended arms at opposite sides of the motor member adapted to engage a part of said movable member to actuate the same.

' 5. In a typewriter, a carriage, a motor member thereforprovided with an-escapement wheel, arocking yoke disposed allel to the wheel and provided with lined and movable dogs coeperating therewith,

risers from saidyoke embracing said motor 7 member," a universal bail, and parallel arms therefrom engaging said'risers to rock the yoke in one direction. l

6, In a'typewriter, a carriage, a horizontally disposed motor member therefor provided with an escapement wheel, a rocking yoke disposed parallel to an beneath said wheel and provided with fixed and movable dogs coeperating therewith, risers from said yoke embracing said motor member, a universal bail, parallel arms therefrom engaging said risers to rock the yoke, and resilient means for restoring said yoketo initial position. r 7. In a typewriter, a carriage, a motor member therefor provided with an escape- Inent wheel, a rocking yoke disposed parallel to the wheel and provided with fixed and movable dogs cooperating with said wheel,

. tially of said wheel;

19. In a typewriter, an escapement mechanism comprising a spring drum or housing, a rocking yoke pivoted thereon and carrying a fixed dog, an escapement wheel disposed intermediate the yoke and housing and cooperating with said dog, a cooperating movable dog pivotally mounted upon the upper face of said yoke to travel laterally and circlumferentially of said wheel, and means to permit the'releasing of said movable dog by its movement radially from said wheel.

20. In a typewriter, an escapement mechanism comprising a spring drum or housing,

a rocking yoke pivotedthereon and carrying a fixed dog, an escapement wheel cooperating with said dog, a cooperating movable dogpivotally mounted upon said yoke to' travel laterallyand circumferentially of said wheel, a slotted connection at the pivot of said movable dog to permit its movement radially of said wheel, a rock lever pivoted upon the yoke intermediate its ends and having one end seated upon said movable dog, and means for actuating the other end of said lever.

21. In a typewriter, the combination. with a rocking escapement mechanism, of means extended therefrom for actuating a ribbon feed, a typebar actuated universal ball having an arm disposed to contact with said escapement mechanism in. substantial alinement with said means, independent means from said bail'extended beneath the escapement to actuate a ribbon vibrating member,

7 and spacing means for actuating said escapement independent of the universal bail.

22. In a typewriter, an escapement yoke comprising a horizontally disposed body portion provided with means for supporting fixed and movable dogs, pivoting lugs at each side of said body, and angularly disposed uprightscarried by the body above the pivots thereof to be engaged by a bail member.

23. In a typewriter, an escapement yoke comprising a body portion provided with means for supporting fixed and movable dogs, pivoting lugs for said body,oand longitudinal arms extending from the body toward opposite sides of the typewriter and adapted to receive ribbon feed pawls.

9A. In a typewriter, an escapement yoke comprisinga body portion provided with means for supporting fixed and movable dogs, pivoting lugs at each side of said body, uprights carried by the body above the pivots thereof to be engaged by a bail member, oppositely extending longitudinal arms from the body adapted to receive ribbon feed pawls, and connecting means at the front and rear of said body to receive tensioning devices for the movable dog and yoke respectively.

25. In a typewriter, an escapement mechanism comprising a motor provided with an escapement wheel having peripheral teeth projecting in the plane thereof, a rocking member disposed parallel with said wheel with its axis intersecting that of the wheel, fixed and movable dogs both carried by said member at one side of said axis and at opposite faces of the wheel to laterally traverse the teeth thereof, and a angular swinging actuating extension from said member at the opposite side of its axis from said dogs.

26. In a typewriter, an escapement mechanism comprising a motor provided with an escapement wheel having peripheral teeth, a rocking member disposed parallel to said wheel with its axis intersecting that of the wheel, a fixed dog carried by said member at one side of its axis, a cooperating movable dog thereon provided with an elongated aperture at its pivoted end and a releasing seat intermediate its ends, and a release lever having one end engaging said seat to elfect a movement of the dog in a substantially straight path.

In testimony whereof I aflix my signature.

- CHARLES SPIRO. 

